// Copyright 2007-2012 Chris Patterson, Dru Sellers, Travis Smith, et. al.
//  
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use 
// this file except in compliance with the License. You may obtain a copy of the 
// License at 
// 
//     http://www.apache.org/licenses/LICENSE-2.0 
// 
// Unless required by applicable law or agreed to in writing, software distributed 
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
// specific language governing permissions and limitations under the License.
namespace Topshelf.Supervise.Threading
{
    using System;

    class ScheduledOperationExecuterImpl :
        ScheduledOperationExecuter
    {
        readonly Fiber _fiber;
        readonly Action _operation;
        bool _cancelled;

        public ScheduledOperationExecuterImpl(DateTime scheduledAt, Fiber fiber, Action operation)
        {
            ScheduledAt = scheduledAt;
            _fiber = fiber;
            _operation = operation;
        }

        public DateTime ScheduledAt { get; set; }

        public void Cancel()
        {
            _cancelled = true;
        }

        public void Execute()
        {
            if (_cancelled)
                return;

            _fiber.Add(_operation);
        }
    }
}